# Trigonometry! vs Trigonometry Identities Proofs

The clearest difference is price: Trigonometry! at Free against Trigonometry Identities Proofs's $0.99. Trigonometry! also leads on rating (2.0 vs 1.0) and update cadence (every 4 months vs every 32 months). Trigonometry Identities Proofs's advantage is in-app purchases (none vs 1). On ratings volume, ads and device support there is nothing between them.

Trigonometry! is free to download; Trigonometry Identities Proofs costs $0.99 up front. Trigonometry! sells 1 one-off in-app purchase. Trigonometry Identities Proofs asks for nothing beyond the download.

Trigonometry! holds the better App Store score, 2.0 against 1.0. Both are backed by a comparable volume of ratings — 4 and 2 respectively. Written reviews point the same way: 14% of Trigonometry!'s written reviews are positive against 0% of Trigonometry Identities Proofs's.

Trigonometry! ships an update every 4 months, Trigonometry Identities Proofs every 32 months. The most recent releases landed on September 18, 2026 and August 15, 2026 respectively.

## The numbers

| Metric | Trigonometry! | Trigonometry Identities Proofs |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| Rating | **[2.0 (4 ratings)](https://appshunter.io/ios/app/trigonometry/id1236663817/reviews)** | [1.0 (2 ratings)](https://appshunter.io/ios/app/trigonometry-identities-proofs/id1547838514/reviews) |
| Number of ratings | **4** | 2 |
| Positive reviews | **14.3% of reviews** | 0.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 4 months** | Every 32 months |
| Monetization | **Free** | Paid |
| Size | 29 MB | 18 MB |
| Requires iOS | **9.0** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 12+ |
| Developer | [AppCrab](https://appshunter.io/developer/1227198215) | [H3 Apps, LLC](https://appshunter.io/developer/598620927) |

## What reviewers say

### Trigonometry!

[App page](https://appshunter.io/ios/app/trigonometry/id1236663817)

Master trigonometry with this comprehensive mobile helper. It offers a textbook, visual explanations, and video lessons covering all essential formulas and theorems. Prepare for your exams with detailed content and easy-to-understand explanations.

**Highlights:** Ordered set of basic formulas and theorems, 172 video lessons, Easy-to-read and understand textbook, Covers major trigonometry topics, Visual explanations

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Trigonometry Premium | $0.99 | one-time |


### Trigonometry Identities Proofs

[App page](https://appshunter.io/ios/app/trigonometry-identities-proofs/id1547838514)

Learn and practice trigonometric identity proofs with step-by-step solutions. Compare your work to the app's detailed explanations, revealing each step individually.

**Highlights:** 42 trigonometric identity proofs, Step-by-step solution reveal, Compare your work to app solutions, Practice trigonometry, Educational math tool

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Trigonometry! free?

Trigonometry! is free to download, with in-app purchases available.

### Is Trigonometry Identities Proofs free?

Trigonometry Identities Proofs costs $0.99, with no in-app purchases.

### Which has better reviews, Trigonometry! or Trigonometry Identities Proofs?

Trigonometry! is rated higher. Trigonometry! averages 2.0 out of 5 from 4 ratings, while Trigonometry Identities Proofs averages 1.0 from 2 ratings.

### Do Trigonometry! or Trigonometry Identities Proofs have ads?

Neither Trigonometry! nor Trigonometry Identities Proofs shows ads.

### Which is updated more often, Trigonometry! or Trigonometry Identities Proofs?

Trigonometry! ships an update every 4 months, and Trigonometry Identities Proofs every 32 months. Most recently, Trigonometry! was updated on September 18, 2026 and Trigonometry Identities Proofs on August 15, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*